No mounting of ext4 on mac 10.9 or 10.11

I just tried ExtFS on mac 10.9 or 10.11. In both cases prior installing the ExtFS mac showed uninitialized disk when I insert external USB disk with ext4 partition.. After installing the trial driver and rebooting when I insert this disk nothing happens. In the system preferences there is no ext4 partition.

What could be wrong?